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Hesper Guidelines
A coding agent that works through your backlog overnight and leaves reviewed pull requests by morning.
Introduction
Hesper is a coding agent that works the night shift. Give it the backlog at the end of the day: tests to fix, a library to upgrade, docs to bring up to date. It works through them overnight and leaves reviewed pull requests to read in the morning.
Hesperus is the evening star, Venus, the first light to come out at dusk. The wordmark is hespər: the second e is the first e turned over, the way the evening turns into night. Said HES-pər, the turn is the name’s whole idea and the icon on its own.
Night and Venus cream carry the brand, with Dusk blue and an ember horizon for the hours in between.
At a glance
Logo- Night#12141C
- Venus#F2E8C8
- Haze#A7A9B8
- Aa Geist
- Aa Geist Mono
Give it the work at dusk. Read it at dawn.
Wordmark scale
- 72 px
- 60 px
- 48 px
- 38 px
- 30 px
- 24 px
- 18 px
hespər is always written with its turned ə: never two plain e’s, never a capital H. Use the lockup (the ə tile, then the word) where the brand introduces itself; the wordmark alone in a navigation bar; the ə alone for the app icon, the profile picture and the favicon. In the terminal and in code, use the monospaced cut. Teach the turn once near the logo: hespər, said HES-pər.
Mark construction
Clear space is 2x on every side, where x is one stem. The ə is exactly the e turned 180 degrees, on the same baseline; the tile is as tall as the h, and the gap between tile and word is 0.3 of the tile.
Signature
Three cuts
Small sizes
- Lockup, 110 px wide
- Wordmark, 14 px
- The ə, 24 px
- 16 px cut
Logo on your background
Use the dark artwork: 15.0:1 against this ground. Logos need at least 3:1 (WCAG 2, non-text contrast).
Please don’t
Core palette
The colours of one evening, from the hero’s sky: Night for the ground, Venus for the star and every word that matters, Dusk for the blue hour, Ember for the last light on the horizon. Dawn is the morning the pull requests are read in: the light ground for documents and print. CMYK values are a plain device conversion for reference; proof Venus and Ember on press.
Color proportions
Night carries the brand and Venus the words. Dusk is the second ground; Ember appears once per surface, never as text on light grounds.
Readable combinations
- AaVenus on Night15.0:1AAA
- AaHaze on Night7.8:1AAA
- AaNight on Venus15.0:1AAA
- AaVenus on Dusk10.4:1AAA
- AaHaze on Dusk5.4:1AA
- AaNight on Dawn16.5:1AAA
- AaNight on Ember6.3:1AA
- AaEmber on Night6.3:1AA
- AaDusk on Dawn11.5:1AAA
- AaEmber on Dawn2.6:1Fail
Ember is a dark-ground colour: on Dawn it falls to 2.6:1, so use Dusk for links and accents on light pages. Haze holds AA on both Night and Dusk. Ratios are WCAG 2 contrast, measured on the sRGB values above: AAA from 7:1, AA from 4.5:1, AA Large from 3:1 (large or bold text only).
Check a pairing
15.0:1AAA
Type system
Headlines and text, as on the website: semibold 600 at 48 px with −1.2 px tracking for the hero line, medium 500 at 18 px for the sub line, regular for text. A plain grotesque that sits under the heavy custom wordmark without competing. By Vercel, SIL Open Font License 1.1, about 70 KB variable. This preview doesn’t load it yet, so the line above falls back to your system’s face.
Tasks, times, branch names and the command line, where the monospaced cut of the logo also lives. By Vercel, SIL Open Font License 1.1. This preview doesn’t load it yet, so the line above falls back to your system’s face.
Click any specimen line to try your own words.
Type scale
Read it at dawn.
Give it the work at dusk. Read it at dawn.
Queue it before you log off.
Tests · Upgrade · Docs · Triage
A coding agent that works through your backlog overnight and leaves reviewed pull requests by morning.
hespər, said HES-pər
Tone of voice
Hesper speaks like a trusted colleague on the night shift: brief, dry, exact. It reports what it did, what it didn’t, and why, and it leaves the decisions to the morning.
Evening and morning are the brand’s only images: dusk, dawn, the star. Never sleep jokes, never hustle.
The colleague on the night shift
Hand it the work at the end of the day; read its notes with your coffee. The people reading are engineers who review everything, so Hesper is precise about what it changed and honest about what it couldn’t do.
Report, don’t perform
Say what changed, what was skipped and why. No enthusiasm, no exclamation marks.
| Say | Avoid |
|---|---|
| Upgraded the date library. Two tests changed; both explained in the PR. | Crushed your backlog overnight!! |
| Stopped at the migration: it needs your call. | 10x your team while you sleep. |
Dusk and dawn, nothing else
The evening star is the only metaphor. No robots, no wizards, no sleep puns.
| Say | Avoid |
|---|---|
| Ready by morning. | Hesper never sleeps so you can! |
The engineer decides
Hesper proposes; people merge. Say so plainly.
| Say | Avoid |
|---|---|
| Every change waits for your review. | Ships straight to production, automatically. |
Highway billboard
The signature line at the hour it describes: the lockup in Venus on Night, the evening star above the board.
Office lightbox
Laptop sticker
Enamel mug
Read it at dawn: the wordmark in Venus on a Night enamel mug, morning light over the city.
Pins and stickers
Hoodie
Pattern: evening sky
The ə repeated in Dusk on Night, one in Venus: the star that comes out first. The device is the ə alone, large.
Export assets
What’s inside the zip · 55 files · 1.3 MB
- svg/Vector logos (SVG)16 files · 89 KB
- export/PNG logos, favicons and profile pictures28 files · 849 KB
- pattern/Pattern tile and device (SVG, PNG)4 files · 90 KB
- scenes/Application images (WebP)6 files · 500 KB
- README.txtWhat each folder holds, and the colours1 file
